California Code, Financial Code - FIN § 18192

The payment of money, credit, goods, or things in action as consideration for any sale or assignment of, or order for, the payment of wages, salary, commissions, or other compensation for services, whether earned or to be earned, is, for the purposes of regulation under this division, a loan secured by such assignment, and the amount by which the assigned compensation exceeds the amount of consideration actually paid is interest and charges upon or for such loan from the date of payment to the date the compensation is payable.  This section does not modify or affect existing statutes governing wage assignments in this state, or authorize such assignments.